Brake Fluid Level Switch Test

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

Remove the reservoir cap (A). Check that the float (B) moves up and down freely; if it doesn't, replace the reservoir cap assembly.

Fig 1: Removing Reservoir Cap
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Check for continuity between the terminals with the float in the down position (C) and the up position (D).
- With the float up, there should be no continuity.
- With the float down, there should be continuity.